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1. The Collision of Your Kiss by anonymousyellowlizard

   Fandoms: Undertale (Video Game)  

   • Explicit
   • No Archive Warnings Apply
   • F/M
   • Complete Work

   07 Jan 2026

   Tags

   • No Archive Warnings Apply
   • Alphys/Sans (Undertale)
   • Alphys & Sans (Undertale)
   • Alphys (Undertale)
   • Sans (Undertale)
   • Mentioned Undyne (Undertale)
   • Queen Alphys (Undertale)
   • Post-Queen Alphys Ending
   • Post-Undertale Neutral Route
   • Aborted Undertale Genocide Run
   • Dacryphilia
   • Alphys Needs a Hug (Undertale)
   • Sans (Undertale) Needs a Hug
   • College friends salphys
   • References to Depression
   • Porn with Plot
   • Porn with Feelings
   • Angst and Hurt/Comfort
   • Angst and Fluff and Smut
   • Tragedy
   • but in the past
   • Introspection
   • Character Study
   • Ecto-Genitalia (Undertale)
   • Grief/Mourning
   • Restraints
   • Sort Of
   • Kissing
   • they are trying their best
   • Sans may be in love
   • You Decide
   • Friends to Lovers
   • Anxious Alphys (Undertale)
   • POV Sans (Undertale)
   • Dark
   • Kinktober 2025

   Summary

   Her voice broke on the word. The strong visage she had kept up this whole time started to crack and unravel – she was starting to unravel, coming apart at the seams. She looked away as her face crumbled and a tear escaped her.

   To his horror, Sans felt something hot stir within him at the sight.

   Back in simpler times, before all of this, Sans and Alphys had had a few friendly tumbles in the bed. Now, with most of the kingdom dead and a lot of responsibility dropped on them both, they fall into familiar habits when things fall apart.

   Series

   • Part 28 of Kink/Whumptober 2025

   Language:

   English

   Words:

   3,737

   Chapters:

   1/1

   Comments:

   2

   Kudos:

   25

   Bookmarks:

   1

   Hits:

   333